2 * Copyright (c) 2008-2011 Atheros Communications Inc.
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 #include <linux/dma-mapping.h>
22 static void ath9k_reset_beacon_status(struct ath_softc *sc)
24 sc->beacon.tx_processed = false;
25 sc->beacon.tx_last = false;
29 * This function will modify certain transmit queue properties depending on
30 * the operating mode of the station (AP or AdHoc). Parameters are AIFS
31 * settings and channel width min/max
33 int ath_beaconq_config(struct ath_softc *sc)
35 struct ath_hw *ah = sc->sc_ah;
36 struct ath_common *common = ath9k_hw_common(ah);
37 struct ath9k_tx_queue_info qi, qi_be;
40 ath9k_hw_get_txq_props(ah, sc->beacon.beaconq, &qi);
41 if (sc->sc_ah->opmode == NL80211_IFTYPE_AP) {
42 /* Always burst out beacon and CAB traffic. */
47 /* Adhoc mode; important thing is to use 2x cwmin. */
48 txq = sc->tx.txq_map[WME_AC_BE];
49 ath9k_hw_get_txq_props(ah, txq->axq_qnum, &qi_be);
50 qi.tqi_aifs = qi_be.tqi_aifs;
51 qi.tqi_cwmin = 4*qi_be.tqi_cwmin;
52 qi.tqi_cwmax = qi_be.tqi_cwmax;
55 if (!ath9k_hw_set_txq_props(ah, sc->beacon.beaconq, &qi)) {
57 "Unable to update h/w beacon queue parameters\n");
60 ath9k_hw_resettxqueue(ah, sc->beacon.beaconq);
66 * Associates the beacon frame buffer with a transmit descriptor. Will set
67 * up rate codes, and channel flags. Beacons are always sent out at the
68 * lowest rate, and are not retried.
70 static void ath_beacon_setup(struct ath_softc *sc, struct ath_vif *avp,
71 struct ath_buf *bf, int rateidx)
73 struct sk_buff *skb = bf->bf_mpdu;
74 struct ath_hw *ah = sc->sc_ah;
75 struct ath_common *common = ath9k_hw_common(ah);
77 struct ath9k_11n_rate_series series[4];
78 int flags, ctsrate = 0, ctsduration = 0;
79 struct ieee80211_supported_band *sband;
82 ath9k_reset_beacon_status(sc);
85 flags = ATH9K_TXDESC_NOACK;
89 sband = &sc->sbands[common->hw->conf.channel->band];
90 rate = sband->bitrates[rateidx].hw_value;
91 if (sc->sc_flags & SC_OP_PREAMBLE_SHORT)
92 rate |= sband->bitrates[rateidx].hw_value_short;
94 ath9k_hw_set11n_txdesc(ah, ds, skb->len + FCS_LEN,
95 ATH9K_PKT_TYPE_BEACON,
97 ATH9K_TXKEYIX_INVALID,
101 /* NB: beacon's BufLen must be a multiple of 4 bytes */
102 ath9k_hw_filltxdesc(ah, ds, roundup(skb->len, 4),
103 true, true, ds, bf->bf_buf_addr,
106 memset(series, 0, sizeof(struct ath9k_11n_rate_series) * 4);
108 series[0].Rate = rate;
109 series[0].ChSel = ath_txchainmask_reduction(sc,
110 common->tx_chainmask, series[0].Rate);
111 series[0].RateFlags = (ctsrate) ? ATH9K_RATESERIES_RTS_CTS : 0;
112 ath9k_hw_set11n_ratescenario(ah, ds, ds, 0, ctsrate, ctsduration,
116 static void ath_tx_cabq(struct ieee80211_hw *hw, struct sk_buff *skb)
118 struct ath_softc *sc = hw->priv;
119 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
120 struct ath_tx_control txctl;
122 memset(&txctl, 0, sizeof(struct ath_tx_control));
123 txctl.txq = sc->beacon.cabq;
125 ath_dbg(common, ATH_DBG_XMIT,
126 "transmitting CABQ packet, skb: %p\n", skb);
128 if (ath_tx_start(hw, skb, &txctl) != 0) {
129 ath_dbg(common, ATH_DBG_XMIT, "CABQ TX failed\n");
130 dev_kfree_skb_any(skb);
134 static struct ath_buf *ath_beacon_generate(struct ieee80211_hw *hw,
135 struct ieee80211_vif *vif)
137 struct ath_softc *sc = hw->priv;
138 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
142 struct ath_txq *cabq;
143 struct ieee80211_tx_info *info;
146 ath9k_reset_beacon_status(sc);
148 avp = (void *)vif->drv_priv;
149 cabq = sc->beacon.cabq;
151 if ((avp->av_bcbuf == NULL) || !avp->is_bslot_active)
154 /* Release the old beacon first */
159 dma_unmap_single(sc->dev, bf->bf_buf_addr,
160 skb->len, DMA_TO_DEVICE);
161 dev_kfree_skb_any(skb);
165 /* Get a new beacon from mac80211 */
167 skb = ieee80211_beacon_get(hw, vif);
171 ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp =
174 info = IEEE80211_SKB_CB(skb);
175 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
177 * TODO: make sure the seq# gets assigned properly (vs. other
180 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
181 sc->tx.seq_no += 0x10;
182 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
183 hdr->seq_ctrl |= cpu_to_le16(sc->tx.seq_no);
186 bf->bf_buf_addr = dma_map_single(sc->dev, skb->data,
187 skb->len, DMA_TO_DEVICE);
188 if (unlikely(dma_mapping_error(sc->dev, bf->bf_buf_addr))) {
189 dev_kfree_skb_any(skb);
192 ath_err(common, "dma_mapping_error on beaconing\n");
196 skb = ieee80211_get_buffered_bc(hw, vif);
199 * if the CABQ traffic from previous DTIM is pending and the current
200 * beacon is also a DTIM.
201 * 1) if there is only one vif let the cab traffic continue.
202 * 2) if there are more than one vif and we are using staggered
203 * beacons, then drain the cabq by dropping all the frames in
204 * the cabq so that the current vifs cab traffic can be scheduled.
206 spin_lock_bh(&cabq->axq_lock);
207 cabq_depth = cabq->axq_depth;
208 spin_unlock_bh(&cabq->axq_lock);
210 if (skb && cabq_depth) {
212 ath_dbg(common, ATH_DBG_BEACON,
213 "Flushing previous cabq traffic\n");
214 ath_draintxq(sc, cabq, false);
218 ath_beacon_setup(sc, avp, bf, info->control.rates[0].idx);
221 ath_tx_cabq(hw, skb);
222 skb = ieee80211_get_buffered_bc(hw, vif);
228 int ath_beacon_alloc(struct ath_softc *sc, struct ieee80211_vif *vif)
230 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
234 struct ath_beacon_config *cur_conf = &sc->cur_beacon_conf;
237 avp = (void *)vif->drv_priv;
239 /* Allocate a beacon descriptor if we haven't done so. */
240 if (!avp->av_bcbuf) {
241 /* Allocate beacon state for hostap/ibss. We know
242 * a buffer is available. */
243 avp->av_bcbuf = list_first_entry(&sc->beacon.bbuf,
244 struct ath_buf, list);
245 list_del(&avp->av_bcbuf->list);
247 if (ath9k_uses_beacons(vif->type)) {
250 * Assign the vif to a beacon xmit slot. As
251 * above, this cannot fail to find one.
254 for (slot = 0; slot < ATH_BCBUF; slot++)
255 if (sc->beacon.bslot[slot] == NULL) {
256 avp->av_bslot = slot;
257 avp->is_bslot_active = false;
259 /* NB: keep looking for a double slot */
260 if (slot == 0 || !sc->beacon.bslot[slot-1])
263 BUG_ON(sc->beacon.bslot[avp->av_bslot] != NULL);
264 sc->beacon.bslot[avp->av_bslot] = vif;
269 /* release the previous beacon frame, if it already exists. */
271 if (bf->bf_mpdu != NULL) {
273 dma_unmap_single(sc->dev, bf->bf_buf_addr,
274 skb->len, DMA_TO_DEVICE);
275 dev_kfree_skb_any(skb);
280 /* NB: the beacon data buffer must be 32-bit aligned. */
281 skb = ieee80211_beacon_get(sc->hw, vif);
285 tstamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
286 sc->beacon.bc_tstamp = (u32) le64_to_cpu(tstamp);
287 /* Calculate a TSF adjustment factor required for staggered beacons. */
288 if (avp->av_bslot > 0) {
292 intval = cur_conf->beacon_interval ? : ATH_DEFAULT_BINTVAL;
295 * Calculate the TSF offset for this beacon slot, i.e., the
296 * number of usecs that need to be added to the timestamp field
297 * in Beacon and Probe Response frames. Beacon slot 0 is
298 * processed at the correct offset, so it does not require TSF
299 * adjustment. Other slots are adjusted to get the timestamp
300 * close to the TBTT for the BSS.
302 tsfadjust = TU_TO_USEC(intval * avp->av_bslot) / ATH_BCBUF;
303 avp->tsf_adjust = cpu_to_le64(tsfadjust);
305 ath_dbg(common, ATH_DBG_BEACON,
306 "stagger beacons, bslot %d intval %u tsfadjust %llu\n",
307 avp->av_bslot, intval, (unsigned long long)tsfadjust);
309 ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp =
312 avp->tsf_adjust = cpu_to_le64(0);
315 bf->bf_buf_addr = dma_map_single(sc->dev, skb->data,
316 skb->len, DMA_TO_DEVICE);
317 if (unlikely(dma_mapping_error(sc->dev, bf->bf_buf_addr))) {
318 dev_kfree_skb_any(skb);
321 ath_err(common, "dma_mapping_error on beacon alloc\n");
324 avp->is_bslot_active = true;
329 void ath_beacon_return(struct ath_softc *sc, struct ath_vif *avp)
331 if (avp->av_bcbuf != NULL) {
334 avp->is_bslot_active = false;
335 if (avp->av_bslot != -1) {
336 sc->beacon.bslot[avp->av_bslot] = NULL;
342 if (bf->bf_mpdu != NULL) {
343 struct sk_buff *skb = bf->bf_mpdu;
344 dma_unmap_single(sc->dev, bf->bf_buf_addr,
345 skb->len, DMA_TO_DEVICE);
346 dev_kfree_skb_any(skb);
350 list_add_tail(&bf->list, &sc->beacon.bbuf);
352 avp->av_bcbuf = NULL;
356 void ath_beacon_tasklet(unsigned long data)
358 struct ath_softc *sc = (struct ath_softc *)data;
359 struct ath_beacon_config *cur_conf = &sc->cur_beacon_conf;
360 struct ath_hw *ah = sc->sc_ah;
361 struct ath_common *common = ath9k_hw_common(ah);
362 struct ath_buf *bf = NULL;
363 struct ieee80211_vif *vif;
364 struct ath_tx_status ts;
369 * Check if the previous beacon has gone out. If
370 * not don't try to post another, skip this period
371 * and wait for the next. Missed beacons indicate
372 * a problem and should not occur. If we miss too
373 * many consecutive beacons reset the device.
375 if (ath9k_hw_numtxpending(ah, sc->beacon.beaconq) != 0) {
376 sc->beacon.bmisscnt++;
378 if (sc->beacon.bmisscnt < BSTUCK_THRESH * sc->nbcnvifs) {
379 ath_dbg(common, ATH_DBG_BSTUCK,
380 "missed %u consecutive beacons\n",
381 sc->beacon.bmisscnt);
382 ath9k_hw_stop_dma_queue(ah, sc->beacon.beaconq);
383 if (sc->beacon.bmisscnt > 3)
384 ath9k_hw_bstuck_nfcal(ah);
385 } else if (sc->beacon.bmisscnt >= BSTUCK_THRESH) {
386 ath_dbg(common, ATH_DBG_BSTUCK,
387 "beacon is officially stuck\n");
388 sc->sc_flags |= SC_OP_TSF_RESET;
389 spin_lock(&sc->sc_pcu_lock);
391 spin_unlock(&sc->sc_pcu_lock);
398 * Generate beacon frames. we are sending frames
399 * staggered so calculate the slot for this frame based
400 * on the tsf to safeguard against missing an swba.
404 if (ah->opmode == NL80211_IFTYPE_AP) {
409 intval = cur_conf->beacon_interval ? : ATH_DEFAULT_BINTVAL;
410 tsf = ath9k_hw_gettsf64(ah);
411 tsf += TU_TO_USEC(ah->config.sw_beacon_response_time);
412 tsftu = TSF_TO_TU((tsf * ATH_BCBUF) >>32, tsf * ATH_BCBUF);
413 slot = (tsftu % (intval * ATH_BCBUF)) / intval;
414 vif = sc->beacon.bslot[slot];
416 ath_dbg(common, ATH_DBG_BEACON,
417 "slot %d [tsf %llu tsftu %u intval %u] vif %p\n",
418 slot, tsf, tsftu / ATH_BCBUF, intval, vif);
421 vif = sc->beacon.bslot[slot];
427 bf = ath_beacon_generate(sc->hw, vif);
429 bfaddr = bf->bf_daddr;
433 if (sc->beacon.bmisscnt != 0) {
434 ath_dbg(common, ATH_DBG_BSTUCK,
435 "resume beacon xmit after %u misses\n",
436 sc->beacon.bmisscnt);
437 sc->beacon.bmisscnt = 0;
442 * Handle slot time change when a non-ERP station joins/leaves
443 * an 11g network. The 802.11 layer notifies us via callback,
444 * we mark updateslot, then wait one beacon before effecting
445 * the change. This gives associated stations at least one
446 * beacon interval to note the state change.
448 * NB: The slot time change state machine is clocked according
449 * to whether we are bursting or staggering beacons. We
450 * recognize the request to update and record the current
451 * slot then don't transition until that slot is reached
452 * again. If we miss a beacon for that slot then we'll be
453 * slow to transition but we'll be sure at least one beacon
454 * interval has passed. When bursting slot is always left
455 * set to ATH_BCBUF so this check is a noop.
457 if (sc->beacon.updateslot == UPDATE) {
458 sc->beacon.updateslot = COMMIT; /* commit next beacon */
459 sc->beacon.slotupdate = slot;
460 } else if (sc->beacon.updateslot == COMMIT && sc->beacon.slotupdate == slot) {
461 ah->slottime = sc->beacon.slottime;
462 ath9k_hw_init_global_settings(ah);
463 sc->beacon.updateslot = OK;
466 /* NB: cabq traffic should already be queued and primed */
467 ath9k_hw_puttxbuf(ah, sc->beacon.beaconq, bfaddr);
468 ath9k_hw_txstart(ah, sc->beacon.beaconq);
470 sc->beacon.ast_be_xmit += bc; /* XXX per-vif? */
471 if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) {
472 spin_lock_bh(&sc->sc_pcu_lock);
473 ath9k_hw_txprocdesc(ah, bf->bf_desc, (void *)&ts);
474 spin_unlock_bh(&sc->sc_pcu_lock);
479 static void ath9k_beacon_init(struct ath_softc *sc,
483 if (sc->sc_flags & SC_OP_TSF_RESET) {
485 ath9k_hw_reset_tsf(sc->sc_ah);
488 ath9k_hw_beaconinit(sc->sc_ah, next_beacon, beacon_period);
490 if (sc->sc_flags & SC_OP_TSF_RESET) {
491 ath9k_ps_restore(sc);
492 sc->sc_flags &= ~SC_OP_TSF_RESET;
497 * For multi-bss ap support beacons are either staggered evenly over N slots or
498 * burst together. For the former arrange for the SWBA to be delivered for each
499 * slot. Slots that are not occupied will generate nothing.
501 static void ath_beacon_config_ap(struct ath_softc *sc,
502 struct ath_beacon_config *conf)
504 struct ath_hw *ah = sc->sc_ah;
505 u32 nexttbtt, intval;
507 /* NB: the beacon interval is kept internally in TU's */
508 intval = TU_TO_USEC(conf->beacon_interval);
509 intval /= ATH_BCBUF; /* for staggered beacons */
513 * In AP mode we enable the beacon timers and SWBA interrupts to
514 * prepare beacon frames.
516 ah->imask |= ATH9K_INT_SWBA;
517 ath_beaconq_config(sc);
519 /* Set the computed AP beacon timers */
521 ath9k_hw_disable_interrupts(ah);
522 ath9k_beacon_init(sc, nexttbtt, intval);
523 sc->beacon.bmisscnt = 0;
524 ath9k_hw_set_interrupts(ah, ah->imask);
528 * This sets up the beacon timers according to the timestamp of the last
529 * received beacon and the current TSF, configures PCF and DTIM
530 * handling, programs the sleep registers so the hardware will wakeup in
531 * time to receive beacons, and configures the beacon miss handling so
532 * we'll receive a BMISS interrupt when we stop seeing beacons from the AP
533 * we've associated with.
535 static void ath_beacon_config_sta(struct ath_softc *sc,
536 struct ath_beacon_config *conf)
538 struct ath_hw *ah = sc->sc_ah;
539 struct ath_common *common = ath9k_hw_common(ah);
540 struct ath9k_beacon_state bs;
541 int dtimperiod, dtimcount, sleepduration;
542 int cfpperiod, cfpcount;
543 u32 nexttbtt = 0, intval, tsftu;
545 int num_beacons, offset, dtim_dec_count, cfp_dec_count;
547 /* No need to configure beacon if we are not associated */
548 if (!common->curaid) {
549 ath_dbg(common, ATH_DBG_BEACON,
550 "STA is not yet associated..skipping beacon config\n");
554 memset(&bs, 0, sizeof(bs));
555 intval = conf->beacon_interval;
558 * Setup dtim and cfp parameters according to
559 * last beacon we received (which may be none).
561 dtimperiod = conf->dtim_period;
562 dtimcount = conf->dtim_count;
563 if (dtimcount >= dtimperiod) /* NB: sanity check */
565 cfpperiod = 1; /* NB: no PCF support yet */
568 sleepduration = conf->listen_interval * intval;
571 * Pull nexttbtt forward to reflect the current
572 * TSF and calculate dtim+cfp state for the result.
574 tsf = ath9k_hw_gettsf64(ah);
575 tsftu = TSF_TO_TU(tsf>>32, tsf) + FUDGE;
577 num_beacons = tsftu / intval + 1;
578 offset = tsftu % intval;
579 nexttbtt = tsftu - offset;
583 /* DTIM Beacon every dtimperiod Beacon */
584 dtim_dec_count = num_beacons % dtimperiod;
585 /* CFP every cfpperiod DTIM Beacon */
586 cfp_dec_count = (num_beacons / dtimperiod) % cfpperiod;
590 dtimcount -= dtim_dec_count;
592 dtimcount += dtimperiod;
594 cfpcount -= cfp_dec_count;
596 cfpcount += cfpperiod;
598 bs.bs_intval = intval;
599 bs.bs_nexttbtt = nexttbtt;
600 bs.bs_dtimperiod = dtimperiod*intval;
601 bs.bs_nextdtim = bs.bs_nexttbtt + dtimcount*intval;
602 bs.bs_cfpperiod = cfpperiod*bs.bs_dtimperiod;
603 bs.bs_cfpnext = bs.bs_nextdtim + cfpcount*bs.bs_dtimperiod;
604 bs.bs_cfpmaxduration = 0;
607 * Calculate the number of consecutive beacons to miss* before taking
608 * a BMISS interrupt. The configuration is specified in TU so we only
609 * need calculate based on the beacon interval. Note that we clamp the
610 * result to at most 15 beacons.
612 if (sleepduration > intval) {
613 bs.bs_bmissthreshold = conf->listen_interval *
614 ATH_DEFAULT_BMISS_LIMIT / 2;
616 bs.bs_bmissthreshold = DIV_ROUND_UP(conf->bmiss_timeout, intval);
617 if (bs.bs_bmissthreshold > 15)
618 bs.bs_bmissthreshold = 15;
619 else if (bs.bs_bmissthreshold <= 0)
620 bs.bs_bmissthreshold = 1;
624 * Calculate sleep duration. The configuration is given in ms.
625 * We ensure a multiple of the beacon period is used. Also, if the sleep
626 * duration is greater than the DTIM period then it makes senses
627 * to make it a multiple of that.
632 bs.bs_sleepduration = roundup(IEEE80211_MS_TO_TU(100), sleepduration);
633 if (bs.bs_sleepduration > bs.bs_dtimperiod)
634 bs.bs_sleepduration = bs.bs_dtimperiod;
636 /* TSF out of range threshold fixed at 1 second */
637 bs.bs_tsfoor_threshold = ATH9K_TSFOOR_THRESHOLD;
639 ath_dbg(common, ATH_DBG_BEACON, "tsf: %llu tsftu: %u\n", tsf, tsftu);
640 ath_dbg(common, ATH_DBG_BEACON,
641 "bmiss: %u sleep: %u cfp-period: %u maxdur: %u next: %u\n",
642 bs.bs_bmissthreshold, bs.bs_sleepduration,
643 bs.bs_cfpperiod, bs.bs_cfpmaxduration, bs.bs_cfpnext);
645 /* Set the computed STA beacon timers */
647 ath9k_hw_disable_interrupts(ah);
648 ath9k_hw_set_sta_beacon_timers(ah, &bs);
649 ah->imask |= ATH9K_INT_BMISS;
652 * If the beacon config is called beacause of TSFOOR,
653 * Interrupts will be enabled back at the end of ath9k_tasklet
655 if (!(sc->ps_flags & PS_TSFOOR_SYNC))
656 ath9k_hw_set_interrupts(ah, ah->imask);
659 static void ath_beacon_config_adhoc(struct ath_softc *sc,
660 struct ath_beacon_config *conf)
662 struct ath_hw *ah = sc->sc_ah;
663 struct ath_common *common = ath9k_hw_common(ah);
664 u32 tsf, intval, nexttbtt;
666 ath9k_reset_beacon_status(sc);
668 intval = TU_TO_USEC(conf->beacon_interval);
669 tsf = roundup(ath9k_hw_gettsf32(ah) + TU_TO_USEC(FUDGE), intval);
670 nexttbtt = tsf + intval;
672 ath_dbg(common, ATH_DBG_BEACON,
673 "IBSS nexttbtt %u intval %u (%u)\n",
674 nexttbtt, intval, conf->beacon_interval);
677 * In IBSS mode enable the beacon timers but only enable SWBA interrupts
678 * if we need to manually prepare beacon frames. Otherwise we use a
679 * self-linked tx descriptor and let the hardware deal with things.
681 ah->imask |= ATH9K_INT_SWBA;
683 ath_beaconq_config(sc);
685 /* Set the computed ADHOC beacon timers */
687 ath9k_hw_disable_interrupts(ah);
688 ath9k_beacon_init(sc, nexttbtt, intval);
689 sc->beacon.bmisscnt = 0;
691 * If the beacon config is called beacause of TSFOOR,
692 * Interrupts will be enabled back at the end of ath9k_tasklet
694 if (!(sc->ps_flags & PS_TSFOOR_SYNC))
695 ath9k_hw_set_interrupts(ah, ah->imask);
698 static bool ath9k_allow_beacon_config(struct ath_softc *sc,
699 struct ieee80211_vif *vif)
701 struct ath_beacon_config *cur_conf = &sc->cur_beacon_conf;
702 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
703 struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
704 struct ath_vif *avp = (void *)vif->drv_priv;
707 * Can not have different beacon interval on multiple
710 if ((sc->sc_ah->opmode == NL80211_IFTYPE_AP) &&
711 (sc->nbcnvifs > 1) &&
712 (vif->type == NL80211_IFTYPE_AP) &&
713 (cur_conf->beacon_interval != bss_conf->beacon_int)) {
714 ath_dbg(common, ATH_DBG_CONFIG,
715 "Changing beacon interval of multiple \
720 * Can not configure station vif's beacon config
723 if ((sc->sc_ah->opmode == NL80211_IFTYPE_AP) &&
724 (vif->type != NL80211_IFTYPE_AP)) {
725 ath_dbg(common, ATH_DBG_CONFIG,
726 "STA vif's beacon not allowed on AP mode\n");
730 * Do not allow beacon config if HW was already configured
731 * with another STA vif
733 if ((sc->sc_ah->opmode == NL80211_IFTYPE_STATION) &&
734 (vif->type == NL80211_IFTYPE_STATION) &&
735 (sc->sc_flags & SC_OP_BEACONS) &&
736 !avp->primary_sta_vif) {
737 ath_dbg(common, ATH_DBG_CONFIG,
738 "Beacon already configured for a station interface\n");
744 void ath_beacon_config(struct ath_softc *sc, struct ieee80211_vif *vif)
746 struct ath_beacon_config *cur_conf = &sc->cur_beacon_conf;
747 struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
749 if (!ath9k_allow_beacon_config(sc, vif))
752 /* Setup the beacon configuration parameters */
753 cur_conf->beacon_interval = bss_conf->beacon_int;
754 cur_conf->dtim_period = bss_conf->dtim_period;
755 cur_conf->listen_interval = 1;
756 cur_conf->dtim_count = 1;
757 cur_conf->bmiss_timeout =
758 ATH_DEFAULT_BMISS_LIMIT * cur_conf->beacon_interval;
761 * It looks like mac80211 may end up using beacon interval of zero in
762 * some cases (at least for mesh point). Avoid getting into an
763 * infinite loop by using a bit safer value instead. To be safe,
764 * do sanity check on beacon interval for all operating modes.
766 if (cur_conf->beacon_interval == 0)
767 cur_conf->beacon_interval = 100;
770 * We don't parse dtim period from mac80211 during the driver
771 * initialization as it breaks association with hidden-ssid
772 * AP and it causes latency in roaming
774 if (cur_conf->dtim_period == 0)
775 cur_conf->dtim_period = 1;
780 static bool ath_has_valid_bslot(struct ath_softc *sc)
786 for (slot = 0; slot < ATH_BCBUF; slot++) {
787 if (sc->beacon.bslot[slot]) {
788 avp = (void *)sc->beacon.bslot[slot]->drv_priv;
789 if (avp->is_bslot_active) {
799 void ath_set_beacon(struct ath_softc *sc)
801 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
802 struct ath_beacon_config *cur_conf = &sc->cur_beacon_conf;
804 switch (sc->sc_ah->opmode) {
805 case NL80211_IFTYPE_AP:
806 if (ath_has_valid_bslot(sc))
807 ath_beacon_config_ap(sc, cur_conf);
809 case NL80211_IFTYPE_ADHOC:
810 case NL80211_IFTYPE_MESH_POINT:
811 ath_beacon_config_adhoc(sc, cur_conf);
813 case NL80211_IFTYPE_STATION:
814 ath_beacon_config_sta(sc, cur_conf);
817 ath_dbg(common, ATH_DBG_CONFIG,
818 "Unsupported beaconing mode\n");
822 sc->sc_flags |= SC_OP_BEACONS;
825 void ath9k_set_beaconing_status(struct ath_softc *sc, bool status)
827 struct ath_hw *ah = sc->sc_ah;
829 if (!ath_has_valid_bslot(sc))
834 /* Re-enable beaconing */
835 ah->imask |= ATH9K_INT_SWBA;
836 ath9k_hw_set_interrupts(ah, ah->imask);
838 /* Disable SWBA interrupt */
839 ah->imask &= ~ATH9K_INT_SWBA;
840 ath9k_hw_set_interrupts(ah, ah->imask);
841 tasklet_kill(&sc->bcon_tasklet);
842 ath9k_hw_stop_dma_queue(ah, sc->beacon.beaconq);
844 ath9k_ps_restore(sc);